IMPORTANT: Note affecting all Linux Classic/Superсlassic builds It has been found that V.2.5 Classic for Linux has problems with AST delivery if used with glibc 2.5. With glibc 2.7 it works properly. The situation with glibc 2.6 is unknown for now. If your glibc version is lower than v.2.7, it must be upgraded before using Firebird 2.5 Classic/Superсlassic.

Only NPTL threading is supported in this release for both "Superclassic" and Superserver on x86. Linux versions that do not support the NPTL threading model cannot run Firebird 2.5 Superclassic or Superserver. To test, run the command "getconf GNU_LIBPTHREAD_VERSION". If it doesn't return something like "NPTL 2.n.n" but something like "linuxthreads-0.nn" then either install Classic (for use with [x]inetd) or upgrade your Linux.

NOTE: To make the new engine work properly under multi-threaded conditions we had to use Grand Central Dispatch, which was first released in MacOSX 10.6 (Snow Leopard). MacOSX users should be aware that Firebird 2.5 will run only on MacOSX 10.6 or higher versions. If you want to use an earlier version of OSX you will need to use an earlier version of Firebird.